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首页> 外文会议>Proceedings of the Sixth international conference on computational structures technology >Prediction of the Two-Scale Buckling Response of Sandwich Beams under In-Plane Compression
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Prediction of the Two-Scale Buckling Response of Sandwich Beams under In-Plane Compression

机译：平面压缩作用下夹层梁两尺度屈曲响应的预测

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This paper is dedicated to the study of global (at the sandwich scale) and local (atrnthe component scale) buckling in sandwich structures. First, a uniu0002ed analytical characterizationrnis given for both global and local buckling. Then these analytical criticalrnloads are translated into sandwich conu0002guration selection diagrams. A 'light' FErnmodel is then proposed to carry out low CPU-time non-linear post-buckling analyses.rnThe post-buckling response computed for elastic materials are mostly super-critical,rnfor small geometrical imperfections. But for some conu0002gurations, interactive bucklingrncan develop yielding a highly sub-critical response due to the occurrence of somernunsymmetrically distributed geometrical localizations. When an elastoplastic core isrnconsidered the response becomes systematically sub-critical, and limit loads reducernconsequently. A strong imperfection sensitivity is also noticed.
机译：本文致力于研究三明治结构的整体（在三明治尺度上）和局部（在组件尺度上）屈曲。首先，给出了整体屈曲和局部屈曲的统一分析特征。然后，将这些分析临界载荷转换为三明治配置参数选择图。然后提出一个“轻型” FErn模型来进行低CPU时间的非线性后屈曲分析。对于弹性材料，所计算的后屈曲响应主要是超临界的，对于较小的几何缺陷。但是对于某些配置，由于某些不对称分布的几何局部的出现，交互式屈曲会发展成产生高度亚临界响应。当考虑一个弹塑性核心时，响应会系统地变为次临界状态，因此极限载荷会减少。还注意到很强的缺陷敏感性。

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